Does Google Sell Ads To Other Search Engine SERPs?

As you can see from the screen shot, Ask.com is buying ad space for the term “equal housing logo requirements”. When I saw this I thought, I wonder if Ask is getting into the real estate design business. But, I was curious, so I clicked the ad and found that it points to an Ask.com SERP.

Sure, I have seen ads in Google to other search engines, but never to another SERP. Google has always had a long standing policy about including other SERP’s in their organic listings, even if Ask.com has found a way around that as well. So is this something new? Or is Ask.com’s dieing effort to stay relevant?